Power on/off push button. Pressing the switch toggles
the power between on and standby. SW3 signals are also connected
to J6 and this enables the use of an external front-panel switch.

SW4

SYSTEM_nRESET

System reset push button. Pressing the switch generates
a reset to the PCI arbiter on the backplane and all of the PCI cards.
SW4 signals are also connected to J7 and this enables the use of
an external front-panel switch.